1/2" T-bolts - 50 ft lbs. SPEC Clutches: For That Next Engine Swap Or OEM, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop, Moroso Anti-Roll Kit Is The Right Tool For The, Steer Your Classic Ride Straight With A New CPP Steering, NEW LS Bellhousing For Magnum And T56-Shifted Hot, Fenix Is A Next-Gen 69 Camaro With 1,180, A Brothers Quarrel Results In This Fine 1955 Chevy, Is This Barn Find The Worlds First Corvette? This is done in order to decrease pre-load on the bearings; adding more shims will have an overall effect of decreasing it. PINION NUT GM 7.5 8.5. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! Alternate Description. Gear oil is nasty stuff, mostly in smell. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. On the other hand, if your backlash is too wide you will need to adjust by moving the carrier towards the pinion with a similar measurement technique. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Backlash refers to the distance between two mating gear teeth when they are not engaged. Chevy Hardcore NEWSLETTER - SIGN UP FREE! The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. For 30 spline pinion axles, PYN10 offers a 10-bolt 8.5" pinion nut that is designed to provide secure and reliable performance in the toughest of conditions. 2429 Mercantile Drive Suite A Therefore when dealing with these types of sleeves it's important to make sure they are installed correctly so as not to compromise its integrity or longevity. Additionally, it increases load capacity because it prevents misalignment due to vibration or thermal expansion of components. The only torque you should be concerned with is the torque it takes to rotate the pinion gear alone, 8-14 inch pounds for old bearings, 16-29 in/lbs. Use oil on the pinion nut washer surface during all assemblies . From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. Additionally, its unique thread pattern provides torque retention while eliminating any possibility of loosening or vibrating off over time due to vibration or shock loads. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! Max Ellery's Land Cruiser Repair Manual 1969-1990 (FJ & RJ) It's got a 350 with a 10-bolt rear end. When compressing the crush sleeve, many guys use an impact wrench and end up crushing it too far, ruining the sleeve. Constructed from high quality steel, the PYN10 features an integral washer design that ensures proper alignment of the bearing preload during installation and prevents damage to both the yoke and bearings. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, Rare Rides: The 1969 Chevrolet Camaro COPO, SPEC Clutches: For That Next Engine Swap Or OEM Upgrade, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip, Why You Need A Proper Fuel Tank Vent In Your Ride, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower. Sure, you know whats in there and what it does but are you willing to tear into it and rebuild the differential? Now that the hard part is done you can re install the carrier with the shims in place, torque the bearing caps and run one more contact pattern to make sure everything is good to go. The date and location of manufacture coding changed in 1971. If you're just starting out your adventure with single speed or fixed gear bikes then it's best to opt for ratios around 2.7-2.8 as they are easier on your legs and can help build up strength gradually as you continue cycling further and faster each time. on new bearings, or 1.2 Nm (10 inch lbs.) TORQUE SPECIFICATIONS. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! Pinion Nut (Solid Spacer) 28-Spline Pinion - 200 ft lbs. I got the price for the seal, and it is near $9. We believe that our exceptional customer service and product knowledge is what sets us apart from the competition. Step 2: Back off, then torque to 35 (lb-ft) for automatic hubs,or 50 (lb-ft) for manual hubs. The ideal amount of torque required on a pinion nut when installing an axle depends on many factors, but typically you should aim for 110-125 ft/lbs of torque unless otherwise specified by step #6 during the installation process. 2. unbolt pinion nut. Our LS swap adapter kits make it easy! Alternatively, shims can also be used to adjust the pinion depth. Some vehicles require an 8.5" 10-bolt pinion nut to secure the rear axle assembly of their vehicle. for new bearings. I then assembled the pinion, inner bearing, shim pack in the carrier then pressed on the outer bearing using a 20 t press then installed the yoke washer and nut. As the speedometer rises, each gear shift is accompanied by an even more intense sensation of power, making every drive exhilarating and unforgettable. This will cause the bearings to press more firmly against the races, thereby increasing preload tension. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. While engine power is an indicator of a vehicle's ability to accelerate quickly and reach high top speeds, torque is an indication of how efficiently it can move. Differential Locker Comparison - A detailed comparison of popular differentials and lockers. This distance must be precise; if it is too small, the gears will bind together and cause mechanical stress which can lead to premature wear or failure. For bearings that are already in use, set preload at 15 inch-pounds; if they are new bearings then you should aim for 25 inch-pounds when setting preload. To begin, the yoke or coupler must be attached to the pinion shaft. It also uses a 10 5/8-inch irregular-shaped cover. The rotating torque must be 2 to 3 N-m (15 - 25 inch pounds). Tighten nut until it takes 15-20 inch lbs of torque to rotate the pinion bearings: None: Self Locking Nut . The 8.5-inch is often referred to as the "GM corporate 10-bolt" because of its multiple uses, and the 8.5-inch is a semi-float axle, meaning it has only one axle bearing per side, mounted inside the axle tube. 8-Inch Ford Rear End Torque Specifications. Once you get close to the right pinion preload, shim thickness adjustments need to be made in the .003 and down range to make adjustments, small increments make a big difference in pinion preload. First I measured the old crush sleeve as a starting point. In most cases, however, even with a straight case, a certain degree of backlash can be tolerated up to 0.005? In this context, "hardest gear" refers to the ratio of front sprocket teeth to rear sprocket teeth - typically expressed as 4.55:1. 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. How involved is the process of changing it? Torque measures the amount of force that is generated when the engine rotates at a certain speed. Not sure the torque specs on the carrier bearing caps, we red lock-tight them and hit them with the impact pretty hard at work. With the pinion bearing properly lubricated, increase or decrease . If i missed any thing PLEASE tell me. Call 800.979.0122, 7am-10pm, everyday. MODEL 20. The side bearing preload is the difference of preloads (5) x the gear ratio (3.73) = 18.65. The easiest way to identify the 8.2-inch rearend at a glance is by the shape of the housing and the spacing between the lower bolts on the cover. I was able to pull the old crush sleeve from the pinion gear shaft without damaging it, so I just reused it and added a 0.51mm shim to it. 2023 Power Automedia. Gear Ratio Finder - Find the ideal axle gear ratio for your new larger or smaller tires. minimum is 181 ft-lbs., maximum 325 ft-lbs., keep cranking till you get within the range of 7.8-11.3 in-lbs of preload torque on the pinion. Crawlpedia is an off-road encyclopedia featuring a complete list of proper ring and pinion gear set up torque and backlash specs. But, did you know there is more than one style of 10-bolt rearend? May 22, 2021 / Before disassembly, we marked the bearing caps and kept the side bearing shims on the correct side. Chrysler 300 and Dodge Charger 2006-2008 Torque Specifications Repair Guide. You can replace the pinion seal without changing the crush sleeve. Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. By doing this, it allows for the desired amount of pressure or preload to be applied on these bearings so they are able to work in harmony with each other within their particular drivetrain system. DIFF MODEL. 4.replace seal. By Albert. Crankshaft Main Bearing Cap Bolts 70. The rotational torque spec is between 15-19. Ford 9 inch torque specs; Gear Ratio Calculator; Order Forms. without any detrimental effects occurring. The 12-bolt is generally considered to be the stronger of the two rear axles. On the other hand, if preload is too tight then you'll need to take out the pinion gear and add extra shims in order to reduce bearing pressure against the races. Some guys even go to the trouble of making a set-up bearing so you dont have to press on and remove the pinion bearing to try different shims. Thats usually proven when used in high-performance, high-horsepower applications. you have it pretty much. If youre building a street car and want to improve performance, we all know the drill. See other Red Line Oil Products that we recommend. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Preload doesn't have any effect on spring stiffness; rather, its used as a way of compensating for springs that are too soft or too stiff. Follow along as Zach works over the old 10 bolt and brings it back to life. With the carrier removed w/ new bearings pinion bearing preload should measure a rolling torque of 20-30 in/lbs. Like most 10-bolts, the axles are held in place by C-clips on the inner end of the axles. As an added reference, Speedway Motors also offers a great book from CarTech, titled "High-Performance Differentials, Axles & Drivelines" that helps with step by step breakdowns of the process. On the other hand, reducing the size of the pinion or increasing the size of spur gear will result in decreased top speed but with an increase in acceleration. 5 - 8 : Ring Gear Bolt Torque (Foot lbs) 120 : Bearing Cap Torque (Foot lbs) 135 : Pinion Nut Torque: Tighten as necessary to obtain correct preload: Pinion Bearing Retainer Torque (Foot lbs) :65 : . The 8.5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. Most 8.5-inch 10-bolt rearends have two extruded, cast-in lugs on the bottom of the differential housing at the 5:00 and 7:00 positions. Nut secures driveshaft yoke to pinion gear. For reference use at own risk. Like the 8.2-inch 10-bolt, the 8.5 10-bolts use C-clips to retain the axles. Gear Ratio Calculator - Calculate the gear ratio of gears based on their tooth count. The PYN10 is a 30 spline pinion nut designed for this purpose, and it is specifically made to be used with vehicles that have a 30 spline pinion in their 10-bolt 8.5" rear end assembly. In addition, if the sleeve is over-crushed during installation then it must also be discarded and replaced with a new one as crushing it too much can cause damage to other components within your transmission. Have a seal puller if possible, makes getting the old one out a lot easier. This heavy-duty nut is made with high quality materials and manufactured to exacting standards, ensuring it stands up to whatever you throw at it. For over a decade, the 8.5-inch 10-bolt was widely used as an axle in many cars and trucks produced by General Motors. FORD: .020. This process must be done carefully, gradually increasing the tightness of the nut in increments until it reaches the desired torque level required to rotate the pinion correctly. 12 Bolt Rear Axle Torque Specs. Not only will you be getting the best quality performance with JEGS Pinion Nut, but you'll also have the convenience of knowing it's made to fit GM 8.875 inch 12-bolt car and truck axles. If sticky tires are used, youll quickly turn the 7.5-inch rear into a pile of unusable parts. Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. Then use lock-tight on the threads and tighten the nut back to where it was. It also has an inner diameter of 1 . It is well known that altering the gear ratio of a vehicle, whether it be through changing the pinion or spur gear, can have a significant effect on performance. . Many times when you are rebuilding an existing rear end you want to save the original pinion bearing shim and re use it under the new bearing. Sometimes it feels like youre in a race car when you accelerate hard with a high-torque vehicle. With careful consideration, selecting an appropriate option for your driving style can make a world of difference when it comes to performance and efficiency behind the wheel. Or some do it by feel. What is the gear ratio on a 10 bolt rear end? This is in contrast to high-end torque, which describes how much power and force is produced by an engine at higher RPMs, such as 4000 or 6000. The large flanges are easy to grip and make installation or removal easier than ever before, allowing you to easily tighten or loosen the nut without fear of it slipping away. I thought the pinion nut would be more like 50-75 FOOT pounds? With one nut per package and a 7/8-16 thread size, this pinion nut is made from strong steel and has a sleek black finish for a nice look. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. Ring and Pinion Gear Tooth Patterns - Gear tooth pattern setup and adjustement instructions. EDLANTA there is a "crush" spacer between the two pinion bearings that when tightened properly gives you the proper bearing preload. Back off left-side adjusting nut approximately 2 slots. 9 Minutes Read / The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. Would this be the same How to write up for my truck? Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. The Series 3 carriers are good for use with 2.73 and lower gears (numerically higher), so 3.08 and 3.73 gears work well. While adjusting preload can provide some relief from overly-stiff or soft springs, ultimately you should replace the springs themselves if they dont provide the desired level of performance. Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. If the backlash is too tight, you'll need adjust the carrier shim by moving it away from the pinion. GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both. Many mechanics use an impact gun while others insist the nut should be torqued by hand. How do you fix a loose pinion bearing preload? Good info on this site from what I've seen so far, kudos. range. FSM says 181-325 ft-lbs. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. How a GM 10-Bolt Differential Goes Bad. On the other hand, if the preload is set too loose it can cause a whining noise to originate from within the rear end as well as abnormal gear wear due to excessive movement between the two components - eventually leading to failure. The distance between the lower center bolt on the cover and either adjacent bolt is 3 3/4 inches. 2008 Sprinter 2500 170 - camper van. This ensures all parts remain tightly fitted together without any space between them, resulting in increased stiffness as well as reduced friction within the system as a whole. . Yukon Gear & Axle SK CSGM8.5 Yukon Gear & Axle Crush Sleeve Eliminator Kits | Summit Racing. Our stock 10-bolt was plenty stout to withstand the torture of 165 hp from the ZedSled's stock 350 (yes, that was sarcasm), but we're looking down the barrel at 500 hp from our cammed-up 6.0 swap . It's essential that you use enough force while tightening down the pinion nut so that your component will stay securely attached; however, it's equally important not to over-torque the part, which could cause permanent damage or deformation. These protrusions are larger than those on the 7.5 rearend. http://www.gmfullsize.com/forum/showthread.php?t=41717&highlight=pinion+seal. Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. ALL72156. Furthermore, this action reflects positively on the company's overall commitment to providing reliable transportation services while ensuring its customers' safety remains paramount at all times. These are considered highway gears that are good for top speed, not for off-the-line performance. Currie 60/70 : Torque . . When installing a new 8.5-inch 10-bolt rear differential, it is important to use the right pinion nut for your application. It is important to note that if possible, it is best practice to use an old or used pinion nut for this operation, as new ones can often bind when tightened too much. Part Number. The unique design and shape make installation easier while providing ample strength for off-road applications. Find the application and ratio you need? The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. Axle Retainer Plate Nuts: 3/8" T-bolts - 30 ft lbs. This is a metal spacer, usually made of brass or aluminum, that is used to put tension between the bearings in order to keep them properly spaced and aligned. Peter - I'm retired but work part time as a pain in the ass. This is zero backlash. We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. The Fora platform includes forum software by XenForo. This technology is particularly advantageous in improving vehicle handling and traction under all types of driving conditions, from wet roadways to tight turns. . JavaScript is disabled. GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. If used in a daily driver or cruiser application, the 7.5-inch rearend should survive behind an engine with 350hp, if traction is limited during spirited driving. carrier bearings, races, crush sleeve, pinion nut, pinion seal, a gasket and even has the gear marking grease included. Then after getting the proper gear patterns you put the new crush sleeve and seal in place and tighten the pinion nut to force the crush sleeve. Pinion Bearing Preload (New) (inch/lbs) Pinion Bearing Preload (Used) (inch/lbs) Backlash (.001 in) Ring Gear Bolt Torque (Foot lbs.) (note make sure the pinion bearing is well oiled when doing this procedure.) 1988 C1500 Silverado, 5.7L with some go fast parts. This assembly featured an 8.2-inch ring gear diameter as well as 28-spline axles which provided adequate strength for these vehicles. FOR 1994-2001 CHEVY S10's & GMC SONOMA's. **ALL TORQUE SPECS ARE PER GM FACTORY & HAYNES MANUAL**. :yipi: Thats it?? Used bearings 10 to 14 inch pounds. extended cab crew cab p 14 8 6 gm rear axle specifications 10 bolt cont, what are the torque specs on silverado rear diff cover you need rear axle pinion nut torque specs for a 98 chevy 12 ton pickup 2wd the nut is generally torqued to 260 300 ft lbs or 25 inch, proper torque specs for 2002 chevy silverado 1500 44 hub assembly to steering . So, when adjusting preload, if it is too loose then the shims should be removed. If rotating torque is low, tighten pinion nut in 6.8 Nm (5 ft.